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ICS Type AB Freight Brake Equipment By JW Harding #2518 Edition 1 1935 51 pages
ICS Type AB Freight Brake Equipment By JW Harding #2518 Edition 1 1935 51 pages plus foldouts, includes examination questions. Prepared especially for home study International Correspondence Schools. Illustrated International Textbook Company
Reason for Development.-The "AB" freight brake equipment was developed to provide a more effective brake than heretofore for the heavier cars and the faster schedules of modern freight trains. The principal new features of this equipment are an improved quick service, an improved release, the elimination of undesired emergency during a service application, and a controlled development of brake-cylinder pressure in emergency.
Arrangement of Equipment.-A piping diagram of the "AB" freight brake equipment is shown in Plate 11 in the back of this lesson paper. The equipment is made up of the following parts : An "AB" valve, a brake cylinder, a two-compartment reservoir, which comprises an auxiliary reservoir and an emergency reservoir, a combined dirt collector and a cut-out cock mounted on the pipe bracket of the "AB" valve, a branch-pipe tee bolted to the car underframe by a bolting lug, a pressure-retaining valve, a brake pipe provided with hose and angle cocks, and the necessary piping to make the connection between the various parts.
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